Software Engineering, Machine Learning and Innovation blog.

Tag: ruby

Event sourcing is a design pattern to build applications that are domain centric and easy to extend. The pattern is based on the usage of a persistent event log which substitutes the more classical relational database model for Rails applications. Last week I gave this presentation at the London Ruby User Group you can find […]

Each time we call a function that's meant to perform some operation that could succeed or fail we are always left with the same dilemma. What should be the return value? Should I return nil if a failure happened? Or I should throw an exception? What does failure means anyway? Like every interesting question, the answer is […]

If you use Docker to deploy your Rails application you may want to use the same infrastructure to run your tests. However the setup of your Selenium browser tests is far from obvious with Rails and Docker and may generate some confusion . The short answer is available in this repository on Github. For the long answer keep reading this blog post […]

Building complex queries in ruby can make your code quite difficult to read, manage and reuse. In this blog post I'll present a simple method to decorate active record objects to make your queries fun again!

Rails does not help much when dealing with AJAX uploads by means of external JS libraries. I recently came across a case where a user on www.codementor.io was struggling to use JQuery-upload-file to upload a video to a Rails backend. The main reason to use the library was the progress bar feature, something that is […]

If you are a Rubyist you are probably comfortable using the fetch method on a day-to-day basis but when you are developing in Javascript this sweetness is not immediately available. This is why I wrote underscorejs-fetch.